diff --git a/sub/subJsonService.go b/sub/subJsonService.go
index 5f994d87..27749fe4 100644
--- a/sub/subJsonService.go
+++ b/sub/subJsonService.go
@@ -217,7 +217,7 @@ func (s *SubJsonService) streamData(stream string) map[string]interface{} {
 	delete(streamSettings, "sockopt")
 
 	if s.fragment != "" {
-		streamSettings["sockopt"] = json_util.RawMessage(`{"dialerProxy": "fragment", "tcpKeepAliveIdle": 100, "tcpNoDelay": true}`)
+		streamSettings["sockopt"] = json_util.RawMessage(`{"dialerProxy": "fragment", "tcpKeepAliveIdle": 100, "penetrate": true}`)
 	}
 
 	// remove proxy protocol
diff --git a/web/assets/js/model/outbound.js b/web/assets/js/model/outbound.js
index dd4f09b1..3bf7e944 100644
--- a/web/assets/js/model/outbound.js
+++ b/web/assets/js/model/outbound.js
@@ -373,12 +373,12 @@ class RealityStreamSettings extends CommonClass {
 };
 
 class SockoptStreamSettings extends CommonClass {
-    constructor(dialerProxy = "", tcpFastOpen = false, tcpKeepAliveInterval = 0, tcpNoDelay = false) {
+    constructor(dialerProxy = "", tcpFastOpen = false, tcpKeepAliveInterval = 0, penetrate = false) {
         super();
         this.dialerProxy = dialerProxy;
         this.tcpFastOpen = tcpFastOpen;
         this.tcpKeepAliveInterval = tcpKeepAliveInterval;
-        this.tcpNoDelay = tcpNoDelay;
+        this.penetrate = penetrate;
     }
 
     static fromJson(json = {}) {
@@ -387,7 +387,7 @@ class SockoptStreamSettings extends CommonClass {
             json.dialerProxy,
             json.tcpFastOpen,
             json.tcpKeepAliveInterval,
-            json.tcpNoDelay,
+            json.penetrate,
         );
     }
 
@@ -396,7 +396,7 @@ class SockoptStreamSettings extends CommonClass {
             dialerProxy: this.dialerProxy,
             tcpFastOpen: this.tcpFastOpen,
             tcpKeepAliveInterval: this.tcpKeepAliveInterval,
-            tcpNoDelay: this.tcpNoDelay,
+            penetrate: this.penetrate,
         };
     }
 }
diff --git a/web/html/xui/form/outbound.html b/web/html/xui/form/outbound.html
index 4ef6b489..e3230ae7 100644
--- a/web/html/xui/form/outbound.html
+++ b/web/html/xui/form/outbound.html
@@ -466,8 +466,8 @@
     <a-form-item label="Keep Alive Interval">
         <a-input-number v-model="outbound.stream.sockopt.tcpKeepAliveInterval" :min="0"></a-input-number>
     </a-form-item>
-    <a-form-item label="TCP No-Delay">
-        <a-switch v-model="outbound.stream.sockopt.tcpNoDelay"></a-switch>
+    <a-form-item label="Penetrate">
+        <a-switch v-model="outbound.stream.sockopt.penetrate"></a-switch>
     </a-form-item>
 </template>
 
diff --git a/web/html/xui/settings.html b/web/html/xui/settings.html
index b61f445a..a2c2829e 100644
--- a/web/html/xui/settings.html
+++ b/web/html/xui/settings.html
@@ -459,7 +459,7 @@
                     streamSettings: {
                         sockopt: {
                             tcpKeepAliveIdle: 100,
-                            tcpNoDelay: true
+                            penetrate: true
                         }
                     }
                 },